초록 ▼

In the measurement of ion concentration, a selected base is added to the sample liquid which reduces the hydrogen ion content without producing other cations of a size to which the measuring electrode is sensitive. Bases having a high molecular weight and a dissociation constant, particularly second

In the measurement of ion concentration, a selected base is added to the sample liquid which reduces the hydrogen ion content without producing other cations of a size to which the measuring electrode is sensitive. Bases having a high molecular weight and a dissociation constant, particularly secondary and tertiary amines are suitable for us. The system includes an absorber which mixes sample liquid with gaseous base, means for pressurizing the reference electrode, and an analyzer cell which prevents contamination of the measuring electrode with reference fluid leaking from the reference electrode. A separate reservoir mixes known concentration solutions for calibration purposes. The concentration readout meter of the system includes an auxiliary dial for ease of calibration.

대표청구항 ▼

A method of calibrating a system for measuring ion concentration including an analyzer cell having an electrode which produces a voltage representing the concentration of selected ions in contact with said electrode and a meter having an indicator which moves over a meter scale in accordance with th

A method of calibrating a system for measuring ion concentration including an analyzer cell having an electrode which produces a voltage representing the concentration of selected ions in contact with said electrode and a meter having an indicator which moves over a meter scale in accordance with the voltage on said electrode and an auxiliary scale on said meter movable with respect to said fixed scale comprising: supplying to said analyzer cell a first sample having unknown concentration ca, moving said auxiliary scale to a position such that a reference mark on said auxiliary scale corresponds with the position of said indicator when said first sample is in said analyzer cell, supplying a second sample liquid having a concentration which is a known increment ci above the concentration ca, determining from said auxiliary scale the actual concentration of said second sample as indicated by the position of said indicator with respect to calibration markings on said second scale, and adjusting the zero adjustment of said meter so that said indicator reads said value of actual concentration on said meter scale when said second sample is in said analyzer cell.